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  Normal-state magnetotransport in superconducting Tl2Ba2CuO6+δ to millikelvin temperatures

Mackenzie, A. P., Julian, S., Sinclair, D., & Lin, C. (1996). Normal-state magnetotransport in superconducting Tl2Ba2CuO6+δ to millikelvin temperatures. Physical Review B, 53(9), 5848-5855. doi:10.1103/PhysRevB.53.5848.

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Mackenzie, A. P.1, Author              
Julian, S.R.2, Author
Sinclair, D.C.2, Author
Lin, C.T.2, Author
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1External Organizations, ou_persistent22              
2external, ou_persistent22              

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 Abstract: We report a study of the normal-state Hall effect and magnetoresistance of single crystals of Tl2Ba2CuO6-delta. Using samples with T-c<15 K, we can suppress the superconductivity down to low temperatures with magnetic fields of 16 T, and can thus study the normal state properties over three decades of temperature, extending into the T-->0 limit where it is possible to make a reliable estimate of k(F) similar to 0.7 Angstrom(-1) from the Hall effect in the elastic-scattering regime. The temperature dependence of the Hall coefficient, R(H), below 30 K rules out models in which R(H)(T) is taken as a measure of a real temperature-dependent change in the carrier concentration. The two scattering rates (probed by the resistivity and the cotangent of the Hall angle) which characterize normal-state transport in the cuprates also appear in this overdoped material for T greater than or equal to 30 K. However, as T-->0, we observe only a single scattering rate, whose temperature dependence is dominated by low power terms, in contrast to the T-2 dependence predicted for a Fermi liquid. The relationship between these findings and anomalous behavior previously reported for the upper critical field is discussed.

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 Dates: 1996-03-01
 Publication Status: Published in print
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 Identifiers: ISI: A1996UA01100110
DOI: 10.1103/PhysRevB.53.5848
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Title: Physical Review B
  Other : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 53 (9) Sequence Number: - Start / End Page: 5848 - 5855 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008